When I had my worst flare ever, my resting/sleeping heart rate was about
160 and it would go up to 200 when I tried to do anything (and I was 21 at the time). My GI sent me to a cardiologist who did tests and saw that everything was working properly, it was just a really high heart rate. They thought stress might be doing it. It ended up going down as I got over the flare up. I still have (and have always had) a fast heart rate, but it is now down to about
90 resting. I think the flare up has something to do with it, but you may want to see a cardiologist and have him make sure that everything is ok.